Display Device and Electronic Apparatus

1. A display device comprising: a display unit that includes a dielectric material between two substrates that face each other and a plurality of pixel circuits that apply an electric field to the dielectric material according to an image input gradation for each of a plurality of pixels arranged in a matrix, and displays an image using the plurality of pixels; a capacitance detection unit that outputs a detection signal of a magnitude corresponding to a value of a capacitance of the dielectric material; and a control device that determines, on a basis of the detection signal from the capacitance detection unit, that the display is normal when a correlation value of the capacitance to the image input gradation is in a predetermined correlation, and that the display is abnormal when a plurality of correlation values of the capacitance to a plurality of image input gradations are not in the predetermined correlation, wherein the control device determines the plurality of correlation values are not in the predetermined correlation on a basis of at least one selected from a group comprising: when a change in the plurality of correlation values of the capacitance to the plurality of image input gradations is a predetermined threshold or less, when the plurality of correlation values of the capacitance to the plurality of image input gradations does not change, or when an angle between an approximate line based on the plurality of correlation values of the capacitance to the plurality of image input gradations and a predetermined reference line is a predetermined threshold angle or more.

2. The display device according to claim 1 , wherein the plurality of correlation values of the capacitance to the plurality of image input gradations are correlation values based on the detection signal that is detected at different time points by the capacitance detection unit.

3. The display device according to claim 1 , wherein the capacitance detection unit comprises a plurality of capacitance detection units, each of the plurality of capacitance detection units is arranged in each of a plurality of display regions within a plane of the display unit, and the plurality of correlation values of the capacitance to the plurality of image input gradations are correlation values based on detection signals that are detected by the plurality of capacitance detection units.

4. The display device according to claim 1 , wherein the capacitance detection unit is arranged in each of a plurality of display regions within a plane of the display unit, and the control device determines whether the display is normal or abnormal for each of the plurality of display regions.

5. The display device according to claim 1 , wherein, when it is determined that the display is abnormal, the control device sets the image input gradation of at least a pixel having a capacitance that is detected by the capacitance detection unit to be a minimum gradation or a maximum gradation.

6. The display device according to claim 3 , wherein, when it is determined that the display is abnormal, the control device sets the image input gradation of at least a pixel having a capacitance that is detected by the capacitance detection unit arranged in a display region having the display that is determined to be abnormal to be a minimum gradation or a maximum gradation.

7. The display device according to claim 1 , further comprising an illumination unit that irradiates light toward the display unit, wherein, when it is determined that the display is abnormal, the control device reduces an amount of light of the illumination unit.

8. The display device according to claim 3 , further comprising an illumination unit that irradiates light for each of the plurality of display regions, wherein, when it is determined that the display of at least one of the plurality of display regions is abnormal, the control device reduces an amount of light of the illumination unit which is irradiated on the at least one of the plurality of display regions.

9. The display device according to claim 4 , wherein, when it is determined that part of the display is abnormal, the control device displays an alert in a display region where the display is determined as normal.

10. The display device according to claim 1 , wherein, when it is determined that part of the display is abnormal, the control device displays an alert in a display region where the display is determined as normal.

11. The display device according to claim 1 , wherein the capacitance detection unit includes a plurality of detectors that are arranged such that arrangement density of a portion of the plurality of detectors in a central region of the display unit is different from that of other portions of the plurality of detectors in peripheral regions of the display unit.

12. The display device according to claim 1 , wherein the capacitance detection unit outputs the detection signal when the image input gradation of a pixel having a capacitance that is detected by the capacitance detection unit is a minimum gradation or a maximum gradation.

13. The display device according to claim 4 , wherein the capacitance detection unit outputs the detection signal when the image input gradation of a pixel having a capacitance that is detected by the capacitance detection unit is a minimum gradation or a maximum gradation.

14. A display device comprising: a display unit that includes a dielectric material between two substrates that face each other and a plurality of pixel circuits that apply an electric field to the dielectric material according to an image input gradation for each of a plurality of pixels arranged in a matrix, and displays an image using the plurality of pixels; a capacitance detection unit that outputs a detection signal of a magnitude corresponding to a value of a capacitance of the dielectric material; and a control device that determines, on a basis of the detection signal from the capacitance detection unit, that the display is normal when a correlation value of the capacitance to the image input gradation is in a predetermined correlation, and that the display is abnormal when a plurality of correlation values of the capacitance to a plurality of image input gradations are not in the predetermined correlation, wherein, when the control device determines that the display is abnormal, the control device performs one selected from a group comprising: sets the image input gradation of at least a pixel whose capacitance is detected by the capacitance detection unit to be a minimum gradation or a maximum gradation, reduces an amount of light of an illumination unit, or displays an alert in a display region where the display has been determined as normal.

15. A di splay device comprising: a display unit that includes a dielectric material between two substrates that face each other and a plurality of pixel circuits that apply an electric field to the dielectric material according to an image input gradation for each of a plurality of pixels arranged in a matrix, and displays an image using the plurality of pixels; one or more capacitance detection units that are arranged in each of a plurality of display regions within a plane of the display unit and output detection signals, each detection signal of the detection signals indicative of a magnitude corresponding to a value of a capacitance of the dielectric material in one of the plurality of display regions; and a control device that determines, on a basis of the detection signals from the one or more capacitance detection units, that the display is normal for each of the plurality of display regions when a correlation value of the capacitance to the image input gradation is in a predetermined correlation, and that the display is abnormal for each of the plurality of display regions when a plurality of correlation values of the capacitance to a plurality of image input gradations are not in the predetermined correlation.